Pump



April 14, 1931. F HOBART 1,801,082

PUMP

Filed Oct. 18, 1923 2 Sheets-Sheet l Fiat 43 ATTORNEY F. G. HOBART April 14, 1931.

PUMP

File 18, 1923 2 Sheets-Sheet INVENTOR fiiml/rulvdf/omfiT ATTORNEY Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE FRANKLIN GIHOBAET, OF BELOIT, WISCONSIN, ASSIGNOR T FAIRBANKS, MORSE &

(10., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS PUMP Application filed Gctober 18, 1823. Serial No. 689,324.

My invention relates to improvements in pumps and more particularly to improvements in the air and the vacuum chambers in pumps, and has as its object greater simplicity and economy of manufacture, and more efficient operation.

I prefer to combine the air and vacuum chambers in a single-container, and preferably in a single casting. This arrangement may be arranged in any suitable relation to the other pump parts but I have shown my invention used in conjunction with a bonnet detachably mounted on the pum The relief valve is preferably positioned in the partition between the vacuum chamber and the air chamber, so that, the discharge through this valve will flow back into the vacuum chamber, although, if desired, it may flow to some other place. 7

Though my invention consists largely in the construction and arrangement of parts hereinafter described and particularly pointed out in the claims, yet I do not limit my invention to the precise form or construction of parts shown or the-several parts thereof, inasmuch as various alterations may be made without changing the scope of my invention.

In the drawings Fig. 1 is a plan view of my invention; Fig. 2 is a sectional elevation taken along the section 22 indicated in Fig. 1; and Fig.3 is an end view. Fig. 4 is a view of the screen or strainer shown in outline in Fig. 3. V

In the drawings, a container, 5, preferably has a partition, 6, to provide an air chamber, 7, and a vacuum chamber, 8. I prefer to detachably mount this container upon the pump frame, 26, and for convenience I may use a detachable member here shown as a plate, 9,

serving as a bottom forthe air chamber. The member, 9, preferably holds the outlet valves of which one is shown at 10. The opening 11 is for another such valve if desired. Such valve or valves govern the inlet to the air chamber, 7, and one outlet to the air chamber erably through the passage, 14, the opening,

15, with member, 9, and the cylindrical screen or strainer. 16. This screen is shown more clearly in Fig. 4. It is preferably inserted through opening, 26, situated preferably below the outlet, 15, of the vacuum chamber 8. A plug, 27, serves to hold the strainer in place and by the removal of this plug the strainer may be removed for cleaning.

The relief valve is made up of a valve seat, 17, preferably screwed into the partition, 6, from the bottom. The closure member, 18, seats on the upper surface of the seat, 17. The valve preferably has a central metallic portion, 19, the upper end being threaded to take a nut, 20, which clamps the closure member, 18, against the lower portion of the valve, 21, which may be winged as shown. The nut, 20, is preferably so shaped on its exteriorthat the relief valve spring, 22, will screw onto it. This enables the valve to be withdrawn by means of the spring when the nut, 23, is removed. The smaller tapped opening, 25, in the nut, 23, is for the purpose of permitting the introduction of water for priming the pump.

In operation water or any other fluid desired, is drawn by the suction of the pump through inlet, 18, vacuum chamber,'8, outlet, and strainer, 16, into the pump chamber (not shown). The fluid is forced out by the pressure stroke of the pump, through outlet valves 10 and 11 into air chamber, 7, and from thence out to the tank or water system (not shown) through-outlets, 12 and 2 1-. In case the pressure in the air chamber, 7, becomes too high, as, for example, when the outlet pipes become obstructed or the storage tank becomes too full, the excess pressure in the air chamber will force open the relief valve, 18, against the pressure of the spring, 22, and the fluid will. pass from the air chamber, 7, back into the vacuum chamber, 8.

1. A pump, including in combination, a container, a partition forming a vacuum chamber and an adjacent air chamber therein, a relief valve assembly in the partition, comprising a valve, a valve spring, and means for attaching said spring to said valve, and a'remova-ble valve deck disposed between the container and pump, the container being adapted as adetachable cover for the valve deck.

2. A pump, including an inlet valve, a discharge valve, a detachable plate carrying one of said valves, a removable cover overlying said plate, and formed to constitute a container, a partition forming a chamber therein, normallyadapted to equalize pump suction and an air chamber adjacent the suction chamber, a relief valve assembly in the partition, controlling a passage connecting said chambers, said cover havingan opening in an upper portion of the container, a closure for said opening, wherebysaid opening is allel adjacence to the suction chamber,a par-- tition betweenthe chambers, having a vertical portion disposed intermediately of the chambers, constituting a common wall thereof,'and a horizontal portion overlying one of the pump valves and a part of said plate, and a relief valve assembly disposed in the horizontal portion of said partition, and adapted for selectively establishing direct communication between said chambers, to re lieve excessive pump discharge pressures. V

4. In a pump, a container, a partition in said container forming a vacuum chamber and an air chamber, an opening in said partition, a valve held against said opening by a valve spring extending within said vacuum chamber, and means for attaching said valve spring to said valve, an inlet to said vacuum chamber, an outlet to said vacuum chamber comprising combination an opening and a cylindrical screen extending through said opening, an inlet to said air chamber comprising in combination an opening and an inlet valve over said opening, and an outlet to said air chamber. 7

5. In a pump, a bonnet, a partition in said bonnet forming a vacuum chamber and an air chamber, an opening in said partition, a valve held against said opening by a valve spring extending within said vacuum chamber, and means for attaching said valve spring to said valve, an inlet to said vacuum chamber, an

outlet to said vacuumchamber comprising in combination. an opening and a cylindrical screen extending through said opening, an

. inlet to. said air chamber comprising'in combination an opening and an inlet valve over said opening, and an outlet to said air chamber.

6. A hollow unitary cover adapted to be removably connected to a pump, two adjacent chambers in said cover, a partition therebetween, an inlet to the first of said chambers and an outlet therefrom adapted to be connected to a pump inlet, an inlet to the second of said chambers adapted to'be connected to the outlet of said pump, an outlet from'the second chamber, a valve in the partition within the cover and adapted to control an open ing directly between the two chambers, means including the last named valve, for by-pass ing the discharge through said valvejopening, and a valve-deck, detachably mounted on the pump, and forming an end-closure for said cover.

7. A pump including a pump frame, a plate detachably carried by the frame, and constituting a valve deck, a discharge valve carried by said deck, an open-end air chamber detachably secured to said pump and having its open-end closed by, and covering said valve-declna partition member in said chamber, forming a compartment therein, connected tothe intake side of the pump, said partition having an opening into saidintake compartment, means forming a priming port in saidcoinpartment, and a second valve in the opening in said. partition, whereby excess pressure in the air chamber will be relievedby said second valve.

8. In a pump, including a pump frame, the combination of the pump valves, a valve deck for certain of said valves, and detachably carried by the frame, a discharge line having air chamber therein, a supply line, a vacuumchamber in said supply line, means forming apump-priming port in said vacuum chamber," a partition forming a common wall portion of, and separating said chambers, a. relief valve in the partition between said discharge line and said suction chamber, a spring for said valve, said valve normally preventing flow from said discharge line to said suction chamber, said chambers being formed by a one-piece structure constituting a cover detachably carried by the pump frame, for access to the valve deck, and means permitting insertion and removal of said relief valve and spring, from the outside of said cover.

FRANKLIN G. HOBART. 

